Photoshop CC 2019: Slowdown issues with embedded Smart Objects and animation

Artem, thanks for the files. The engineers are investigating what you're seeing.

Hi Aptem, I'm not able to reproduce what you're seeing. I'm wondering if there's some other problem or conflict happening that's machine specific. If customer weren't able to open files with Smart Objects, we'd be getting 100s/1000s of reports already.

Could you provide a link (dropbox/CC files) to a file with a Smart Object that won't open, and a file with the type of animation where you're seeing a slowdown.

Unfortunately not. These images are subject of commercial secret. In any case, these errors are observed in all files containing objects that are intentionally - even new ones created in 20.0.2.
How can I help you to solve this problem? Maybe I'll show you how it works through Adobe Connect. And we compare how both programs work on my computer

Can you create a demo file and screen capture that doesn't contain any proprietary content if it's easy to create?

I probably wouldn't be able to do a 1:1 screen share until next week.

this is how it works in real time (animation freezes and file opening)
https://www.dropbox.com/s/3q6rngohtpp97ym/ScreenFlow.mp4?dl=0
I did not even begin to shoot the process of opening a file with smart objects, because it does not end. in CC2018 time is 15 seconds and in CC2019 is infinite

Hi Artem, I can see the problem in your video but I cannot recreate it. It's either file or system specific. If I contact you via email would be possible to get ahold of the files to start troubleshooting with? Other than that, I'd recommend trying to restore your preferences. Getting a process sample during the open process while it's hung/slow/processing might help, too. System info from Photoshop's Help > System Info...  dialog from both 2018 and 2019 might also help.

I'm glad to see the engineers are investigating. . . . As many people know I had the Adobe "techs" back out V20 and I'm using V19. I'm still having issues mostly 'sluggishness'. When clicking on the drop down for the brushes, for example, it takes several seconds before the brushes show up and another five seconds or so after selecting a brush. I have even deleted all but one brush to see if that makes a difference and it doesn't. I'm having my machine checked out again to see if it is me before I make a fool of myself. But when the program crashes and windows pop-up when I'm doing something else altogether, I am a little suspicious. I never had an issue with previous versions, but maybe I didn't know what the heck I was doing. I have learned a lot by looking at the answers to other people's issues with PS. I'll let you all know what I find out, but it may be awhile. Good Luck! 

Problem is still not solved